Harvey halligan and harvey rugg



(No Model.) 7 i i H. HALLLIGAN.& H. RUGG,

AUGBR. No. 278.539. Patented May 29,1883.

CZ? ilt 7L (9 WT am"??? N. PETERS. Pholoiilhographnn Washington a c.

UNITED STATES PATENT OFFICE.

HARVEY HALLIGAN AND HARVEY RUGG, bE sEYMoUE, CONN, ASSlGNORS TOTHE NEW HAVEN COPPER COMPANY, OF SAME PLAoE.

SPECIFICATION forming part of Letters Patent No. 278,539, dated May 29, 1883.

Application filed March 30, i883. (No model.) I,

To all whom it may concern:

Be it known that we, HARVEY HALLIGAN and HARVEY RUGG, of Seymour, in the county ofNe'w Haven and State of Connecticut, have invented a new Improvement in Augur-Bits; and we do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description 'from the position seen the edge.

of the same, and which said drawings constitute part of this specification, and represent, 1n

Figure l, a side view, showing the two spurs; Fig. 2, a side view turned one-fourth around in Fig. 1; Fig. 3, an end View. p 7

This invention relates to an improvement in auger-bits, the object being to combine a spur with a gouge-shaped lip, whereby the edges of both the spur and gouge-lip bitmay be obtained; and the invention consists in theconstruction as hereinafter described, and more particularly recited in the claim.

Thetwist A of the bit and its screw-point a are of substantial] y the usual construction, and at each side a spur, b, is formed at a little distance back from the edge of the floor-lip,

as seen in Fig. 3. The floor-lip starts from the center-screw and runs outward, preferablyinclining slightly upwardfrom the point to near There it turns outward, as seen at d, Fig. 1, forming what is known as a gougeshaped cutting-edge alittleinadvance of the spur, as shown. The spurs operate in the usual manner of spur-bits, and cut the periphcry or circle in which the floor-lip is to follow,

and the floor-lip in so following cuts into the wood in the usual manner of gouge-lip bits.

It is well known that the gouge-lip bit is the easiest and most rapidly operating shape for a wood-boring tool; but such shape bores a hole the surface of which presents a spiral groove corresponding to the gouge shape of the edge of the lip. By combining the spur with this turned-up or gouge-shaped floor-lip I cut the surface of the hole in advance ofthe operation of the gouge-lip, and as this spur must necessarily cut in a plane perfectly parallel with the axis of the bit, it follows that v HARVEY HAL'LIGAN. HARVEY RUGG.

Witnesses:

WM. H. WILLIAMS, THOS. L. JAMES. 

